Ghaeles f



' (No Model.)

C. F. DULING.

cLBVIs;

10.268.785 Patented neg. 12, 1882*.

l mf VENTOR .Attorney u Pmnafmwmmm wumgm. n. a

UNITED STATES PATENT OFFICE.

CHARLES F. DULING, OF CHARLESTON, WEST VIRGINIA.

CLEVIS.

SPECIFICATION forming part of Letters Patent No. 268,785, dated December 12, 1882.

` Applicationled May 20,1882. (No model.)

Tovall whom it may concern y Be it known that I, CHARLES F. DULING, a. citizen o'f the United States, residing at Charleston, in the county of Kanawha and State of West Virginia, have invented certain new and useful Improvements in Glevises; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, refer-` ence being had to the accompanying drawings, and to the letters and figures of reference .marked thereon, which form a part of this specication.

This invention relates to improvements in clevises or coupling devices.

It has for its object to provide a safe coupler and one that is readily operated; andit cousists in the peculiar construction of the pin, in connection with the open link, as will be hereinafter fully described, and specificall y pointed out in the claim.

In the drawings, Figure l is a perspective view of the open link. Fig. 2 is a side view of a link with pin inserted. Fig. 3 is an end view of pin; and Figs. 4 and 5 are side views ofthe pin in different positions, as will he described.

a represents the link, made substantially the shape of the ordinary clevis-link, having the arms a.

a2 a2 are openings through the arms a', near the ends of same, and they are made preferably egg-shaped, with the point projected toward the rear, as shown, to correspond to the construction on end of pin, as will be described.

b represents the pin, having the head b at one end and the-projection Z12 at the opposite end. This projection is extended at right angies from the end of the pin, and in connection therewith provides a construction corresponding in conformation With the openings a2 through arms of link, and of proper size to slide snugly through the said openings when properly inserted, as will be described. This projection b2 is extended to what I call for convenience of reference the front7 of the pin. The opposite side I call the rear7 of the pin. Theportions of the pin next the head b', and which bear against the forward rounded wall of opening a2, are perfectly round, as shown in Fig. 4.

b5 is a depression in rear of the pin, midway the head b' and projection b2; This depression is arranged. to receive the link of the chain connected to the clevis in the operation of the device, as will be described.

On the opposite side or front of the pin I l form the projection btin longitudinal line with thedepression b5. This projection extends forward and prevents the pin from turning when draft is exerted thereon.

In the operation of my invention the end link ot' the chain to be connected is inserted between the arms a. of the clevis-link, and the pin b is passed through openings az in linka, andthe link of chain to be connected into the position shown in Fig. 2. In this position it will be observed the projection b2 is in line with the openings a2, and the pin may be removed at pleasure. When the pin has been inserted, as described, I turn it half round to the position indicated in dotted lines, Fig. 2, when it saidlink will fall into the depression b5, and

the draft will be exerted on the pin within the said depression. The projection b4, being within the said link, prevents the pin from turning when draft is exerted thereon.

1t will he observed that by the construction shown and described I provide a pin that may be turned within the link of the chain connectedto the clevis when draft is not exerted thereon in the operation of coupling and uncoupling, and yet one that will be securely prevented from turning when under draft, as described.

I am aware that in clevises a straight coupling-pin provided with a central rib or lug projected forward has been used in connection with open links, and I do not broadly claim such construction as my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

The combination, substantially as described,

with the linka, having its arms formed with In testimony whereof I affix my signature in 1o the openings a2, ofthe pin b, provided with the presence of two Witnesses. head b and the end projection, b2, constructed with the depression b5 in its reaur7 and'the pro- CHARLES FRANKLIN DULING. 5 jecton b4 in the front of' thesame in longitudinal line with the depression b5, the said pin be- Witnesses:

ing adapted to be inserted and turned within W. E. TRUSEOW,

the openings a2 of the link, and operating sub YV. D. SCOTT. stantially as set forth. I 

